import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:motorcycle_dash/features/routes/route_planner_screen.dart';
import 'package:motorcycle_dash/services/auth/auth_providers.dart';
import 'package:motorcycle_dash/services/auth/auth_user.dart';
import 'package:motorcycle_dash/services/entitlements/entitlement_providers.dart';

void main() {
  testWidgets('RoutePlannerScreen renders title, empty state, and stop controls', (tester) async {
    await tester.binding.setSurfaceSize(const Size(360, 640));

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          currentUserProvider.overrideWith((ref) => const AuthUser(
                uid: 'alice',
                isAnonymous: false,
              )),
          isProSubscriberProvider.overrideWith((ref) => false),
        ],
        child: const MaterialApp(
          home: RoutePlannerScreen(),
        ),
      ),
    );

    await tester.pumpAndSettle();

    // Verify AppBar title
    expect(find.text('ROUTE PLANNER'), findsOneWidget);
    expect(find.text('SAVE'), findsOneWidget);

    // Verify Empty state message
    expect(find.text('No stops added yet.'), findsOneWidget);
    expect(find.text('ADD STOP'), findsOneWidget);
    expect(find.text('CURRENT GPS'), findsOneWidget);
  });

  testWidgets('RoutePlannerScreen handles adding a stop', (tester) async {
    await tester.binding.setSurfaceSize(const Size(360, 640));

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          currentUserProvider.overrideWith((ref) => const AuthUser(
                uid: 'alice',
                isAnonymous: false,
              )),
          isProSubscriberProvider.overrideWith((ref) => false),
        ],
        child: const MaterialApp(
          home: RoutePlannerScreen(),
        ),
      ),
    );

    await tester.pumpAndSettle();

    // Tap ADD STOP
    await tester.tap(find.text('ADD STOP'));
    await tester.pumpAndSettle();

    // Dialog appears
    expect(find.text('Add Route Stop'), findsOneWidget);

    // Enter name, lat, lng
    final dialogTextFields = find.descendant(
      of: find.byType(AlertDialog),
      matching: find.byType(TextField),
    );
    await tester.enterText(dialogTextFields.at(0), 'Alice\'s Restaurant');
    await tester.enterText(dialogTextFields.at(1), '37.3861');
    await tester.enterText(dialogTextFields.at(2), '-122.2641');

    // Tap ADD button in dialog
    await tester.tap(find.text('ADD'));
    await tester.pumpAndSettle();

    // Verify stop is added in list
    expect(find.text('Alice\'s Restaurant'), findsOneWidget);
    expect(find.text('1/25 STOPS'), findsOneWidget);
  });

  testWidgets('RoutePlannerScreen responsive layout on narrow 320dp screen', (tester) async {
    // 320dp narrow device test
    await tester.binding.setSurfaceSize(const Size(320, 568));

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          currentUserProvider.overrideWith((ref) => const AuthUser(
                uid: 'alice',
                isAnonymous: false,
              )),
          isProSubscriberProvider.overrideWith((ref) => false),
        ],
        child: const MaterialApp(
          home: RoutePlannerScreen(),
        ),
      ),
    );

    await tester.pumpAndSettle();

    // On narrow screen, compact labels 'ADD' and 'GPS' are shown
    expect(find.text('ADD'), findsOneWidget);
    expect(find.text('GPS'), findsOneWidget);

    // No RenderFlex overflow
    expect(tester.takeException(), isNull);
  });

  testWidgets('RoutePlannerScreen handles title editing under Pixel 8a IME keyboard inset without overflow', (tester) async {
    // Pixel 8a viewport with keyboard open (height reduced from 857 to 440)
    await tester.binding.setSurfaceSize(const Size(385, 440));

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          currentUserProvider.overrideWith((ref) => const AuthUser(
                uid: 'alice',
                isAnonymous: false,
              )),
          isProSubscriberProvider.overrideWith((ref) => false),
        ],
        child: const MaterialApp(
          home: RoutePlannerScreen(),
        ),
      ),
    );

    await tester.pumpAndSettle();

    // Find Route Title TextField
    final titleField = find.byType(TextField).first;
    expect(titleField, findsOneWidget);

    // Enter title text while constrained
    await tester.enterText(titleField, 'Marionette Route Validation');
    await tester.pumpAndSettle();

    expect(find.text('Marionette Route Validation'), findsOneWidget);

    // Verify SAVE button in AppBar and stop controls remain visible and reachable
    expect(find.text('SAVE'), findsOneWidget);
    expect(find.byKey(const ValueKey('route_planner_add_stop_button')), findsOneWidget);
    expect(find.byKey(const ValueKey('route_planner_current_gps_button')), findsOneWidget);
    expect(find.text('No stops added yet.'), findsOneWidget);

    // No RenderFlex overflow
    expect(tester.takeException(), isNull);
  });

  testWidgets('RoutePlannerScreen handles constrained 360x360 and 320x320 dimensions without overflow', (tester) async {
    // Severely constrained 360x360 viewport
    await tester.binding.setSurfaceSize(const Size(360, 360));

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          currentUserProvider.overrideWith((ref) => const AuthUser(
                uid: 'alice',
                isAnonymous: false,
              )),
          isProSubscriberProvider.overrideWith((ref) => false),
        ],
        child: const MaterialApp(
          home: RoutePlannerScreen(),
        ),
      ),
    );

    await tester.pumpAndSettle();

    final titleField = find.byType(TextField).first;
    await tester.enterText(titleField, 'Constrained 360');
    await tester.pumpAndSettle();

    expect(find.text('Constrained 360'), findsOneWidget);
    expect(tester.takeException(), isNull);

    // Extremely constrained 320x320 viewport
    await tester.binding.setSurfaceSize(const Size(320, 320));
    await tester.pumpAndSettle();

    await tester.enterText(titleField, 'Constrained 320');
    await tester.pumpAndSettle();

    expect(find.text('Constrained 320'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  testWidgets('RoutePlannerScreen landscape layout (800x360) renders without RenderFlex overflow', (tester) async {
    // Landscape orientation on wide screen
    await tester.binding.setSurfaceSize(const Size(800, 360));

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          currentUserProvider.overrideWith((ref) => const AuthUser(
                uid: 'alice',
                isAnonymous: false,
              )),
          isProSubscriberProvider.overrideWith((ref) => false),
        ],
        child: const MaterialApp(
          home: RoutePlannerScreen(),
        ),
      ),
    );

    await tester.pumpAndSettle();

    // Verify title field and controls render properly
    final titleField = find.byType(TextField).first;
    await tester.enterText(titleField, 'Skyline Ridge Landscape');
    await tester.pumpAndSettle();

    expect(find.text('Skyline Ridge Landscape'), findsOneWidget);
    expect(find.text('SAVE'), findsOneWidget);
    expect(find.byKey(const ValueKey('route_planner_add_stop_button')), findsOneWidget);
    expect(find.byKey(const ValueKey('route_planner_current_gps_button')), findsOneWidget);

    // No RenderFlex overflow
    expect(tester.takeException(), isNull);
  });

  testWidgets(
      'RoutePlannerScreen landscape (800x360) with status bar and keyboard inset scrolls cleanly and portrait renders cleanly (#76)',
      (tester) async {
    addTearDown(tester.view.resetPhysicalSize);
    addTearDown(tester.view.resetDevicePixelRatio);
    addTearDown(tester.view.resetPadding);
    addTearDown(tester.view.resetViewInsets);

    tester.view.physicalSize = const Size(800, 360);
    tester.view.devicePixelRatio = 1.0;
    tester.view.padding = const FakeViewPadding(top: 24);
    tester.view.resetViewInsets();

    await tester.pumpWidget(
      ProviderScope(
        overrides: [
          currentUserProvider.overrideWith((ref) => const AuthUser(
                uid: 'alice',
                isAnonymous: false,
              )),
          isProSubscriberProvider.overrideWith((ref) => false),
        ],
        child: const MaterialApp(
          home: RoutePlannerScreen(),
        ),
      ),
    );
    await tester.pumpAndSettle();

    // No 2.5px overflow on landscape with status bar padding
    expect(tester.takeException(), isNull);

    // Simulate keyboard opening in landscape (260.5px inset)
    tester.view.viewInsets = const FakeViewPadding(bottom: 200);
    await tester.pumpAndSettle();

    expect(tester.takeException(), isNull);

    final titleField = find.byType(TextField).first;
    await tester.ensureVisible(titleField);
    await tester.pumpAndSettle();
    await tester.enterText(titleField, 'Cherohala Skyway');
    await tester.pumpAndSettle();

    expect(find.text('Cherohala Skyway'), findsOneWidget);
    expect(tester.takeException(), isNull);

    // Scroll down to ADD STOP button and open Add Stop dialog with keyboard inset
    final addStopBtn =
        find.byKey(const ValueKey('route_planner_add_stop_button'));
    await tester.ensureVisible(addStopBtn);
    await tester.pumpAndSettle();
    expect(tester.takeException(), isNull);

    await tester.tap(addStopBtn);
    await tester.pumpAndSettle();
    expect(tester.takeException(), isNull);
    expect(find.text('Add Route Stop'), findsOneWidget);

    await tester.ensureVisible(find.text('CANCEL'));
    await tester.pumpAndSettle();
    await tester.tap(find.text('CANCEL'));
    await tester.pumpAndSettle();

    // Portrait check with keyboard inset
    tester.view.physicalSize = const Size(400, 800);
    tester.view.padding = const FakeViewPadding(top: 24);
    tester.view.viewInsets = const FakeViewPadding(bottom: 280);
    await tester.pumpAndSettle();
    expect(tester.takeException(), isNull);
    expect(find.text('SAVE'), findsOneWidget);
  });
}